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Darrell Harmon

dlharmon@chaos.social

<p>RF and FPGA nerd.</p>

Posts

  • Post #4021430

    I2C specifies a fall time of 12 to 300 ns at 3.3 V, rise time of 20 to 300 ns in fast mode, no minimum rise time in standard mode. Any idea why the minimum rise/fall times? I&#39;d need extra resistors and caps to make an FPGA go that slow. Slow slew minimum drive is still sub-nanosecond.

  • Post #3886201

    AWS billing has a bug. That was a bit of a scare when I got the notification that my monthly threshold of $50 had been exceeded by $275 billion. Slop coding? I&#39;d love to delete my account but it&#39;s the only affordable (aside from 🏴‍☠️) way to access Vivado Enterprise. They quit posting AMIs at 2025.1 but that one still works. Costs $16 per month for storage plus about $0.80 per hour for usage.

  • Post #3843360

    I&#39;m not able to follow links to Analog Devices datasheets due to their WAF blocking access unless I&#39;ve browsed to the product page first. Not being able to follow links from Digikey, Kicad, etc is getting annoying. Yet another reason to locally archive datasheets for anything you use. Anyone else getting this?